Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b2a1e944debe9e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-21 23:56:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7febbbc18942b78b64e0cd298b560b8f SHA-1: 6a4d036ff38631be5f45e13f457d2be80a5213f3 SHA-256: f0b2a1e944debe9e1f0fba5061cb084a35284715eae0ffd018340d726491c06b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-today-game-hack. This indicates a likely attempt to deliver a second-stage payload or engage in phishing by directing the user to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links strongly suggest exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B88 23436 bytes
SHA-256: de24ba75a045be2e87276ec4d3e8be2708dd8d20fe9b77a1aa79535cc7ff0372
font_01_sfnt_off00006088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

Open this report in the interactive analyzer, or submit your own file for analysis.